Universal serial bus chargers and charging management methods

摘要

Universal serial bus chargers and charging management methods thereof are provided. The universal serial bus charger includes a control unit, a charger module, a universal serial bus interface device, and a switch device. The control unit receives a power management signal and provides a switching signal and a charging signal according to the power management signal. The charger module outputs power and a power suspending signal according to the charging signal and a communications protocol signal, respectively. The universal serial bus interface device operates according to the power, and outputs the communications protocol signal according to a universal serial bus peripheral device connected thereto. The switch device is coupled between the charger module and the universal serial bus interface device, and receives the power. Furthermore, the switch device provides the power to the universal serial bus interface device according to the switching signal.

主权项

1. A universal serial bus charger, comprising:
a control unit, receiving a power management signal, and outputting a switching signal and a charging signal according to the power management signal; a charger module, outputting power and a power suspending signal according to the charging signal and a communications protocol signal, respectively; a universal serial bus interface device, operating according to the power, and outputting the communications protocol signal according to a universal serial bus peripheral device connected thereto; and a switch device, coupled between the charger module and the universal serial bus interface device, receiving the power and providing the power to the universal serial bus interface device according to the switch signal and the power suspending signal; wherein the switch device further comprises a logic gate and a transistor, the logic gate has a first input end coupled to the charger module, a second input end coupled to the control unit, and an output end, and the transistor has a first end coupled to the charger module, a second end coupled to the universal serial bus interface device, and a control end coupled to the output end of the logic gate.